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Three Heroes ( (さん) (ゆう) () San Yūshi) is the two hundred and nineteenth chapter of the Dr. Stone manga.


The astronaut selection process for the moon mission begins. As the space expert, Xeno is chosen as the overseer and main selector. Everyone is told that for the majority of the flight, the astronauts will be petrified so they can simplify the life support systems. Due to the unknown nature of Why-man, new astronauts rather than ones from before the first Petrification will be chosen. The roles to be filled are a warrior, a scientist, and a pilot.

As the only pilot, Ryusui is chosen for that role. The scientist, as Xeno must stay as ground control, is Senku, however he needs physical training. They begin by doing the same clothed swimming test that Byakuya had struggled with in the past. As Senku struggles, Nikki helps train him up.

Meanwhile, the other members of the Kingdom of Science stationed around the globe return to their homes, and thus the warriors left in Corn City come back for the selection trials.

After the physical tests, a test of concentration is given to the candidates. Equilibrium trials and other physical trials continue as they whittle down the candidates. Tsukasa is easily the best of the bunch, but Kohaku fares quite well as well.

That evening, Tsukasa calls Kohaku to meet him on a cliff. They begin fighting abruptly, with Kohaku in disbelief that Tsukasa would betray them at this point. He says he's not, simply that he wished to test her skills. He tells her that their skill gap isn't as great as she thinks, thanks to science.

The final roster for the moon mission is Ryusui as the pilot, Senku as the scientist, and Kohaku as the warrior.

Characters in Order of Appearance[]

Chapter Notes[]

  • The astronaut selection process begins.
    • Ryusui is automatically chosen as the pilot.
    • Senku is chosen as the scientist, but needs a lot of physical training before he can go.
  • The members of the Kingdom of Science that were stationed around the world have returned to Japan.
  • Various tests are done to sort the warriors' suitability.
    • Tsukasa notes that Kohaku has drastically improved since their first fight.
  • Kohaku is chosen as the warrior on Tsukasa's recommendation.


  • Tsukasa's scar appears and disappears throughout the whole chapter.

Site Navigation[]

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Chapters and Volumes
Volume 1 1234567Extras
Volume 2 89101112131416Extras
Volume 3 17181519202122232425Extras
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Volume 27 Terraforming4D Science: 14D Science: 24D Science: 3
[v  e]
Story Arcs
Prologue Saga
Stone Formula Arc
Chapters 1234
Episodes 12
Vs. Tsukasa Arc
Chapters 56789101112
Episodes 345
Ishigami Village Saga
Kingdom of Science Arc
Chapters 131415161718192021222324252627282930313233
Episodes 5678910111213
Village Games Arc
Chapters 34353637383940
Episodes 131415
Village Origins Arc
Chapters 4142434445
Episodes 1617
Stone Wars Saga
Vs. Hyoga Arc
Chapters 4647484950
Episodes 1819
Communications Arc
Chapters 5152535455565758596061626364656667686970717273747576777879808182
Episodes 20212223242526272829303132333435
Source of the Petrification Saga
Age of Exploration Arc
Chapters 8384858687888990919293949596979899 100
Episodes 35Ryusui3637383940
Treasure Island Arc
Chapters 101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138
Episodes 4142434445464748495051525354
The Truth of the Petrification Saga
New America City Arc
Chapters 139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169
Episodes 555657
South America Arc
Chapters 170171172173174175176177178179180181182183184185186187188189190191192193
New Stone World Arc
Chapters 194195196197198199200
Globetrotting Arc
Chapters 201202203204205206207208209210211212
Stone to Space Saga
Moon Mission Arc
Chapters 213214215216217218219220221222223224225226227228229230231232